Trans problems?

This sounds very similar to what happened to me about a year ago.
My tires locked up going about 65 and then everything was normal for a little while.

http://www.forabodiesonly.com/mopar/showthread.php?t=166882&highlight=rear+tires+lock

Basically my trans was in 2nd and 3rd at the same time either from an improperly adjusted front band that literally fused itself to the front clutch retainer or the servo got stuck sideways in the bore and locked the band while the front clutch was engaged as well.